Freud proposed that dreams, especially the meaningful content of dreams, were related to mental function, but the rarely misunderstood nature of dreams is very proposing to empirically support or forge this claim. He made it a problem. The inability to study the effects of dreams on mental function has led many researchers to dream as a result of random neural activity (Example: activated synthetic hypothesis by Hobson and Mc Carley). Given that the assumptions about the random nature of dreams are actually correct, it is difficult to propose a theory of how the phenomenology of dream states plays a functional role and can be better understood through evolutionary analysis. However, recent studies discussed take into account the underlying physiological mechanisms of sleep and dreams, the content of dreams, and the environmental conditions of choice, and the nature of dreams as a state of consciousness that remains in between. Evolution of human species suggests that selection is present throughout. This suggests that the dream state was chosen as an adjustment to improve overall fitness. The main theory dealing with dream adaptability is to deal with it by studying various threat scenarios, using the concept of virtual threats, which is defined as a dream state in which the threat situation is virtually constructed. Explain that better equipment may be possible Real-world threats. While this theory provides a plausible evolutionary explanation of dreams, the purpose of this article is to comment on other aspects of dream enhancement and the broader impact of dreams on the evolution of higher mental functions.